"This document is unavailable."

One school requested my LSDAS report yesterday. This morning, under the "Report Date" column, it shows today's date as a clickable link with an Acrobat icon next to it. When I click that, acrobat reader opens to a page that says (in really big letters) "This document is unavailable." What is that? I've only got that one report so far, so I dan't have anything for comparison. Is anyone else seeing this?